-66.02% is the change from 824 to 280
Calculation steps:
[( 280 - 824 ) ÷ 824] x 100 = -66.02%
Formula
Percentage change = [(280 - 824) / 824] x 100
Subtract the new number by the original number
280 - 824 = -544
-544 ÷ 824 = -0.6601941747572816
-0.6601941747572816 x 100 = -66.02%